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(a) If we cross pure - bred tall (...

(a) If we cross pure - bred tall (dominant ) pea plants with pure - bred dwarf ( recessive ) pea plant we get pea plants of ` F_ 1 ` generation. If we now self- cross the pea plants of ` F_1 ` generation, then we obtain pea plants of ` F_ 2 ` generation.
(i) What do the plants of `F_1 ` generation look like ?
(ii) What is the ratio of tall plants dwarf plants in ` F_2 ` generation ?
(iii) State the type of plants not found in ` F_1 ` generation but appeared in ` F_2 ` generation, mentioning the reason for the same.
(b) What are homologous structures ? Give an example. Is it necessary that homologous structures always have common ancestors ?

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